<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮 自成一行 -->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolesList" border stripe style="width: 100%">
        <!-- 展开箭头的 列 -->
        <el-table-column type="expand">
          <!-- 作用域插槽 渲染权限数据-->
          <template slot-scope="scope">
            <el-row
              v-for="(item1, index1) in scope.row.children"
              :key="item1.id"
              :class="['bdbottom', index1 === 0 ? 'bdtop' : '', 'vcenter']"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row, item1)">{{
                  item1.authName
                }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二三级权限 -->
              <el-col :span="19">
                <!-- 嵌套渲染二级权限 -->
                <el-row
                  v-for="(item2, index2) in item1.children"
                  :key="item2.id"
                  :class="[index2 === 0 ? '' : 'bdtop', 'vcenter']"
                >
                  <el-col :span="6">
                    <el-tag
                      type="success"
                      closable
                      @close="removeRightById(scope.row, item2)"
                      >{{ item2.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="item3 in item2.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row, item3)"
                      >{{ item3.authName }}</el-tag
                    >
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>
              {{scope.row}}
            </pre> -->
          </template>
        </el-table-column>
        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column label="操作" width="300px">
          <!-- 使用作用域插槽 -->
          <template slot-scope="scope">
            <!-- {{scope.row}} -->
            <!-- 编辑按钮 -->
            <el-button type="primary" icon="el-icon-edit" size="mini"
              >编辑</el-button
            >
            <!-- 删除按钮 -->
            <el-button type="danger" icon="el-icon-delete" size="mini"
              >删除</el-button
            >
            <!-- 分配角色按钮  tooltip 文字提示组件-->
            <el-button type="warning" icon="el-icon-setting" size="mini"
             @click="showSetRightDialog(scope.row)">分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 分配权限的对话框 -->
    <el-dialog
      title="分配权限"
      :visible.sync="setRightDialogVisible"
      width="50%" @close="setRightDialogClosed"
    >
      <!-- 树形控件 -->
      <el-tree :data="rightsList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>

      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      //角色列表数据
      rolesList: [],
      //控制分配权限对话框的显示与隐藏
      setRightDialogVisible:false,
      //所有权限的数据
      rightsList:[],
      //树形控件的属性绑定对象
      treeProps:{
        //指定节点标签为节点对象的某个属性值
        label:'authName',
        children:'children'
      },
      //默认选中的节点的id值
      defKeys:[],
      //当前即将分配权限的id
      roleId:''
    };
  },
  created() {
    this.getRolesList();
  },
  methods: {
    //获取角色列表数据的函数
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error(res.meta.msg);
      }
      this.rolesList = res.data;
      // console.log(this.rolesList);
    },
    //根据id删除对应的权限
    async removeRightById(role, rightId) {
      console.log(rightId);
      //弹框提示用户是否要删除
      const confirmResult = await this.$confirm(
        "此操作将永久删除该文件,是否继续?",
        "提示",
        {
          comfirmButtonText: "确定",
          cancelButtonText: "取消",
          type: "warning",
        }
      ).catch((err) => err);
      if (confirmResult !== "confirm") {
        return this.$message.info("取消了删除!");
      }
      // console.log('确认了删除');
      //发送删除权限的请求
      const { data: res } = await this.$http.delete(
        `roles/${role.id}/rights/${rightId.id}`
      );
      if (res.meta.status !== 200) {
        return this.$message.error("删除权限失败! ");
      }
      // this.getRolesList()
      // console.log(role);
      role.children = res.data;
    },
    //展示分配权限的对话框
    async showSetRightDialog (role) {
      //形参role就是点击的当前这一行
      this.roleId = role.id
      //获取所有权限的数据
      const {data:res} = await this.$http.get('rights/tree')
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限数据失败! ')
      }
      //把获取到的权限数据保存到data中的rightsList中
      this.rightsList = res.data
      //递归获取三级节点的id
      this.getLeafKeys(role,this.defKeys)
      this.setRightDialogVisible = true
    },
    //通过递归的方式,获取所有角色下所有三级权限的id并保存到defKeys数组中
    getLeafKeys(node,arr) {
      //如果当前node节点不包含children属性则是三级节点
      if (!node.children) {
        return arr.push(node.id)
      }
      //不是三级节点
      node.children.forEach(item => {
        this.getLeafKeys(item,arr)
      })
    },
    //分配权限对话框的关闭执行事件
    setRightDialogClosed () {
      this.defKeys = []
    },
    //点击为角色分配权限 数组类型的数据
    async allotRights() {
      //给tree添加应用ref获取对应的数据 ...是将数组的每一项展开放到keys里
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      //使用join方法将数组转化为字符串
      const idStr = keys.join(',')
      // console.log(idStr);

      const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
      
      console.log(res);

      if (res.meta.status !== 200) {
        return this.$message.error('分配权限失败!')
      }
      this.$message.success('分配权限成功') 
      this.getRolesList()
      this.setRightDialogVisible = false
    }
  },
};
</script>
<style lang="less" scoped>
.el-tag {
  margin: 6px;
}
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style>